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Statics -- Equilibrium

Please look at the attached problem 5-20:
Determine the reactions at the points A and B of the frame.

I know that the following must hold true:
Sum(Moments(b)) = 0
Sum(Fx) = 0
Sum(Fy) = 0

No moment is indicated in the problem, so I'm not sure if that's needed. Your help is appreciated.